How can I improve the processing speed of the microcontroller?

[ShiPC123]

Hello, I use a microcontroller to process the data from the encoder. The baud rate is 3M. I used two versions of STM32DUINO. I found that, with the same code, the processing speed of version 2.10.1 was much slower than the earliest version. The microcontroller is STM32F103RCT6.
Below are some of my configurations and screenshots of the logic analyzer.


[fpistm]

What is the "earlier version"? Your screenshot shows that you used Roger's core not the one here.

[ShiPC123]

Sorry, my explanation was incorrect. Is there any way to increase the processing speed of the code in version 2.10.1?

[uzi18]

@fpistm 2nd configuration screen has malformed link:

[fpistm]

So you compare the 2 cores. Roger's core is more bare metal oriented while this one uses HAL.
To be able to increase speed you probably need to write your own serial code.
You can also try to add a Serial1.flush(); after the write.

[ShiPC123]

Thank you. I have made an attempt here, but it seems that there has been no improvement. I plan to replace the current microcontroller with one that has a higher clock frequency.